This is the most common fix. If Resolve lacks administrative privileges, it can't save the activation file to the system folder. Close DaVinci Resolve completely. Right-click the on your desktop. Select Run as Administrator . Enter your key and hit Activate .
When DaVinci Resolve consistently prompts for an activation key despite previous verification, it is usually due to OS-level changes, version mismatches, or reaching activation limits. Core Reasons for Repeated Activation Prompts davinci resolve keeps asking for activation key verified
Sometimes a Windows or GPU driver update breaks the license handshake. This is the most common fix